Feeding and cutting mechanism.



v 0- BRIEDE.

FEEDING AND CUTTING MECHANISM.

APPIJIOATIOK FILED APR. 27, 190B.

Patented Feb. 21, 1911.

2 sums-BERT 1.

INVENTOR WITNESSES:

0. BRIEDE.

FEEDING AND CUTTING mncrmmsm.

APPLIOATIOH TILED APR. '27, 1908. 984,887, Patented Feb. 21, 1911.

2 SHEETS-SHEET 2.

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M p 1E R a ma v To all whom it may concern: I

or'ro BBIHEDE, or n-nnna'rn, GERMANY.

FEEDING AND CUTTING MECHANISM.

Specification of Letters latent.

Patented Feb. 21, 1911.

Application filed April 27, 1908. sei ial No. 429,430,

Be it known that I, Or'ro BRIEDE, a citizen of the German Empire,residing at Benrath, Germany, have invented or discovered certainnew anduseful Improvements in Feeding and Cutting Mechanism, of whichimprovements the following is a specification. I 7

It is generally characteristic of machines for forming bolts, rivets,screws, etc, that the feed mechanism is so constructed that the lengthof rod fed forward at each operation will vary in accordance withvariations in the diameter of the rod, so that it is practicallyimpossible to manufacture rivets having the same length or the sameamount .of metal in the head.

It is the further object of the invention described herein to providefor such a regulation of the movement of the rod with respect to theshears that all the blanks shall have the same length regardless of anyvariations in the length of the wire fed forward by the feed mechanism.

The invention is hereinafter described and claimed.

In the accompanying drawings forming a. part of this specification,Figure 1 is a top plan view of my improved feed mechanism, Figs. 2 and 3are sectional elevations in planes-indicated by the lines IIII andIIIIII respectively in Fig. 1, and Fig. 4 is a plan view with the capplate removed showing the operation of the shearing mechanism.

In the practice of my invention the mechanism for feeding the rod orwire may be operated in any suitable manner, such for example, as in theconstruction shown wherein a rack bar 10 is reciprocated'by a more fullysuitable means, and engages a pinion 11 on a shaft 12. This shaftoperates through suitable connections to reciprocate a slide 16. In theconstruction shown this shaft is provided at its upper end with a crankarm 13 provided with a pin adapted to engage a pivotally mounted arm 14.Thisarm is adjust-ably connected at one end to a lever, 15 which is alsomounted on the same ivotal pin as the arm 14. The outer en of this lever15 is connected to a slide 16 so as to reciprocate the same to feed therod or stock to the shearing mechanism.

A head 17 is secured to a bar 18 which is movably mounted in a suitablehearing or.

support 19, and on this head 17 is pivotally mounted a bell crank lever20 having one end connected to slide 16 as shown, whlle its opposite endis provided with a point 21 adapted to engage one side of the bar to befed. The opposite end of the rod-gripping .means isformed by a point 22adjustably secured in the had17. By the-movement of the slide 16 to theright the bell crank lever will be shifted so as to cause the rod to begripped between the points 21 and 22, and on the further movement of theslide 16, the head 17 with the rod is moved in the same direction tofeed in a suitable length of rod beyond the shearing blades. On thereturn movement of the slide 16 the rod is first freed from the grippersand the head.

is then shifted backward, a suitable distance by the slide 16 which isprovided with a shoulder or projection 16 adapted to bear against thehead 17 on the return movement of the slide.

On the sliding bar 18 is adjustably mounted a blank adjusting finger 23,said finger extending down into the plane ofmovement of the rod fromwhich the rivets etc. are to be formed.

On the feed movement of the described mechanism, the rod is fed to theright, or

past the shearing mechanism, a distance somewhat greater than the lengthof the blank to be cut, and on the return movement of the feedmechanism, the adjusting finger 23 carried by the sliding bar 18 willstrike against the end of the rod and push it back until only a lengthequal to that required to form the rivet projects beyond the shearblades 24 and 25. In order to hold the stock in positions to which it isfed and adjusted a clamping device is employed,

which has a top plate 23 yieldingly held by springs against the stock.The shear blade 24 is secured to a block 26 adjustably mounted on theframe of the machine. The movable blade 25 is secured to a slide 27mounted in suitable ways on the bed of the machine, and adapted to beshifted to effect a shearing of the rod by means of-a wedge-shapedprojection 28 on the rack bar 10. While not necessary, it is preferredthat this wedge should operate on the slide through a roller 29 carriedby the slide 27. The return movement of the slide after a shearingoperation is effected by a. spring 30. It may sometimes happen that theshear blades become wedged together by metal forced between them, andthe spring W11] not effect the return movement. To overcome thisdifficulty a pm 31 1s so arranged upon the rack 10, thatvon the returnmove ment of the bar 10 it will engage an inclined surface a of theslide 27, and shift the latter sufliciently far to separate the cutters;

7 of the parts will readily suggest themselves wee skilled mechani ydeparting from the spirit "of the invention described herein.

I claim herein as my lnventionz v j 1. A rod feeding mechanism jhavmg 1ncombination a shearing mechanism, means ,for feeding arod through andbeyond the j shearin the des red length of blank to beforrned,

and means for moving the rod back through mechanism" a distanceexceeding 7 the shearing mechanism. f

2. A red feeding mechanismhavingin combination shearing mechanism,reciproeating, mechamsm for feedlng the rod ,through and beyond theshearin mecha nism", means forfreciprocating such mechanism 'a distanceexceeding the desired length of blank to be produced, and meansconnectedto the feedin mechanism to move therod back a, desire distance.

7 3. A rod feeding mechanism having in combination a shearingnlechunisnna slide relative to the shearing mechanisn'l, means for reciprocatingthe slide a distance greater than the actual feed required; grippersadapted to engagethe rod and carried by the reciprocating slide, andmeans for movinguthe. rod'back also connected to the'g slide.

Q. A rogtfeeding mechanism having in combination znsl'l'earingmechanism, a reciprocating' slide, means for moving the slide througharange'of. movement. greater than the length of blankrequired, clamp ngjaws adapted toengage'the rod or stock on the forwa'rd movement-oftheslideand to release the rod on the backward movethe slide, and a gag efinger ecured to said slide and "proj ecting path of movement of therod.

5-. A rod feeding*Imeehanisnr liaving in combination ashearingmeclninism, a reciprocating mechanism to feed the we; "or stock'relat-iveto' tl ieshearing mechanism, and having range of movementgreater than the desired length "of fe'ed, "means ,for

moving the "or stock in reverse direction "and a 'frictionalclaii ptdhold the rod or stock. V t In testimony WlIereof,'-"I' have hereuntoset

